We got only an OEM version of this drive. The design is ascetic:
there is only an Open/Close button on the front panel. The drive, however,
has a dust-proof case. According to the manual, vibration and a noise level
are low. Moreover, it supports operation with DVD-RAM Type
2 discs.

The drive has copied successfully a 780 MBytes disc without any problems.
The time it spent for the copying was 6 min. 2 sec.

Tests of quality of operation with DVD discs

Nero DVD Speed

Testing with a two-layer DVD disc

HITACHI GD-7500

Average Speed

6.260x

Start Speed

3.43x

End Speed

4.37x

Random Seek

121 ms

1/3 Seek

135 ms

Full Seek

212 ms

Reading type

CAV

CPU usage 1x

20%

SpinUp Time

3.79 sec

SpinDown Time

N/A

Layer Change Time

345 ms

Disc Recognition Time

6.99 sec

DVD-Video playback with the Cyberlink PowerDVD
2.55

The DVD-Video was played without any problems; no artifacts were noticed.
During changing the layer the DVD quality didn't get worse.

Noise characteristics

Tray - 3/10

CD

Seek - 5/10

Total noise - 3/10

DVD

Seek - 6/10

Total noise - 4/10

The drive makes quite a lot of noise when working at the highest speed.
When we reduced the speed with the help of external programs (CD
Bremse, Nero DriveSpeed) the noise level got acceptable.
It is possible to decrease the speed to 4x-8x-16x-17x (according
to the program).

Vibration

When working with a badly balanced CD the drive didn't perform well. The vibration was quite noticeable even at the reduced speed, and at high
speeds when reading high-quality discs.

Thermal conditions

There are no any complains about its thermal conditions. The data were
read after an intensive 2-hour operation:

T inside the case - 36°C

T of the upper surface - 39°C

T of the lower surface - 41°C

Possibility to make a multizone drive (RPC-1)

According to www.firmware.fr.st,
the drive can become a multizone one by changing its firmware version.
Or you can just null the region measuring counter with this
utility.